I have uploaded an EPUB file to my website and when I click it's web page link I get 404 The requested document was not found on this server. But if I replace with the PDF version it works OK.
Solved! Go to Solution.
you need to use some thing like BiBi - http://bibi.epub.link/
the site is translated so you might find better instructions using google if you have trouble.
More research reveals that the IIS does not recognize the epub filetype. I fixed by adding a web.config with:
<mimeMap fileExtension=".epub" mimeType="application/epub+zip" />